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Osmium complexes containing either chelating or non-chelating 8-quinolyl ligands

Journal of Organometallic Chemistry
Publication Date
DOI: 10.1016/s0022-328x(97)00409-9
  • Osmium
  • Quinoline
  • Quinolyl
  • Crystal Structure


Abstract The reaction of Qn 2Hg (Qn = 8-quinolyl) with OsHCl(CO)(PPh 3) 3 gives Os(η 2-Qn)Cl(CO)(PPh 3) 2 ( 1), in which the 8-quinolyl ligand binds through both N and C-8 forming a 4-membered chelate ring. Reaction of 1 with AgPF 6 to remove chloride, followed by addition of either Nal or NaS 2CNMe 2, gives the neutral compounds Os(η 2-Qn)I(CO)(PPh 3) 2 ( 2) or Os(η 1-Qn)(η 2-S 2CNMe 2)(CO)(PPh 3) 2 ( 3), respectively, while reaction with AgPF 6 followed by CO gives [Os(η 2-Qn)(CO) 2(PPh 3) 2] +PF 6 - ( 4). Single crystal X-ray structures of 2 and 3 have been determined. In 2, the 8-quinolyl ligand is chelated through C-8 and N, but in 3 it is coordinated only through C-8.

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